Fresh hope in unsolved murder of hospital worker, 25, whose mutilated body was stuffed in binbags 30 years ago

THE parents of an NHS worker who vanished while partying at a nightclub with friends three decades ago believe someone close to her could hold the key to cracking the cold case. Melanie Hall, 25, from Wiltshire, was last seen sitting alone on a stool near the dancefloor in bustling Bath haunt Cadillacs after an…